第二产程延迟屏气对硬膜外分娩镇痛初产妇分娩结局的影响

李一美邵慧静方晓红谢爱兰

Effects of delayed pushing during second-stage labor on birth outcomes among nulliparous women with epidural anesthesia

中国护理管理 . 2016, (3): 319 -322 .